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Registros recuperados: 9
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APPRAISAL OF THE SNAP MODEL FOR PREDICTING NITROGEN MINERALIZATION IN TROPICAL SOILS UNDER EUCALYPTUS Rev. Bras. Ciênc. Solo
Smethurst,Philip James; Gonçalves,José Leonardo de Moraes; Pulito,Ana Paula; Gomes,Simone; Paul,Keryn; Alvares,Clayton Alcarde; Arthur Júnior,José Carlos.
The Soil Nitrogen Availability Predictor (SNAP) model predicts daily and annual rates of net N mineralization (NNM) based on daily weather measurements, daily predictions of soil water and soil temperature, and on temperature and moisture modifiers obtained during aerobic incubation (basal rate). The model was based on in situ measurements of NNM in Australian soils under temperate climate. The purpose of this study was to assess this model for use in tropical soils under eucalyptus plantations in São Paulo State, Brazil. Based on field incubations for one month in three, NNM rates were measured at 11 sites (0-20 cm layer) for 21 months. The basal rate was determined in in situ incubations during moist and warm periods (January to March). Annual rates of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest soil; Soil temperature; Process-based model.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200523
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Edaphic and Topographic Factors and their Relationship with Dendrometric Variation of Pinus Taeda L. in a High Altitude Subtropical Climate Rev. Bras. Ciênc. Solo
Horst,Taciara Zborowski; Dalmolin,Ricardo Simão Diniz; Caten,Alexandre ten; Moura-Bueno,Jean Michel; Cancian,Luciano Campos; Pedron,Fabrício de Araújo; Schenato,Ricardo Bergamo.
ABSTRACT The study of the relationships between the yield potential of forest stands and the conditions offered for plant development is fundamental for the adequate management of the forest when aiming at sustainable high yields. However, these relations are not clear, especially in commercial forests, on rugged terrain where relationships between the landscape, soil, and plants are more complex. Considering this, we tested the hypothesis that the morphological aspects of the soil conditioned by topography are the main limiting factors for tree development. Our objective was to evaluate the edaphic and topographic influence on the dendrometric variation of Pinus taeda L. of a forest stand in a subtropical climate at high altitude. For that, Spearman’s...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest soil; Soil-landscape relationship; Forest site; Soil use; Forest zoning.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100318
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Evaluation of the role of different soil horizons in producing growth of Picea glauca, (Moench) Voss., seedlings. Repositório Alice
SOUSA, G. F. de.
An experiment was designed to determine the effect of 5 forest soil horizons on the growth of Picea glauca (Moench) Voss and to evaluate the contribution of each horizon and two levels of lime in the rate of organic matter decomposition and availability of nutrients. The growth of spruce measured by the fresh and dry weight was affected considerably by the percent organic matter in the soil. The concentration of nutrients in tops and roots was closely related to the concentration of nutrients in the soil with the exception of Ca and Mg concentration. These two elements showed concentration that were higher in tops and roots of white spruce grown in low horizons. This, however, was associated with a decrease in growth. The organic matter was probably the...
Tipo: Teses Palavras-chave: Forest soil; Fertility.; Fertilidade; Solo Florestal..
Ano: 1974 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/401561
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Hidrofobicidade em Neossolo litólico sob plantação de Pinus taeda. Repositório Alice
MAIA, C. M. B. de F.; FUKAMACHI, C. R. B.; CAMBRONERO, Y. C.; DEDECEK, R. A.; MANGRICH, A. S.; NARIMOTO, K. M.; MILORI, D. M. B. P.; SIMOES, M. L..
Compreender os processos de estabilização do carbono no solo pode ser muito útil no desenvolvimento de técnicas de mitigação das emissões de CO2 e do aquecimento global. Quanto maior a hidrofobicidade da matéria orgânica do solo, mais estabilizado é o carbono do solo. Portanto, a hidrofobicidade pode ser usada como indicador para caracterizar a qualidade da matéria orgânica do solo. O presente trabalho caracterizou as estruturas químicas de ácidos húmicos extraídos de solos coletados a três profundidades de um Neossolo sob plantação de Pinus taeda. Os resultados das análises espectroscópicas e químicas (ultra-violeta, fluorescência, ressonância paramagnética eletrônica e difração de raio-X) indicaram que a ocorrência de estruturas conjugadas, grupos...
Tipo: Artigo de periódico Palavras-chave: Humic acid; Water repellency; Forest soil; EPR; X-ray.; Fluorescence..
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/872636
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Hydrophobicity of an Entisol under loblolly pine (Pinus taeda) plantation PFB - Pesquisa Florestal Brasileira
Maia, Claudia Maria Branco de Freitas; Fukamachi, Cristiane Regina Budziak; Cambronero, Yorleni Chang; Dedecek, Renato Antônio; Mangrich, Antônio Sálvio; Narimoto, Kelly Mayumi; Milori, Débora M.B.P.; Simões, Marcelo Luiz.
The understanding of soil carbon stabilization processes can be very useful in the development of mitigation techniques for CO2 emissions and global warming. The greater the hydrophobicity of soil organic matter the more stabilized soil organic carbon. Therefore,  hydrophobicity can be a sensitive index to characterizethe ‘quality’ of soil organic matter. In this context, the present work aimed to characterize the chemical  structures of humic acids collected at three different depths in a hydrophobic Entisol (Neossolo) under  loblolly plantation. The results of spectroscopic and chemical analyses (UV-Vis, fluorescence, EPR and X-ray diffractometry) indicated that, as soil depth increased, so did the content of conjugated organic structures, aromatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Humic acids; Water repellency; Forest soil; Fluorescence; EPR; X-ray. Solos florestais; Repelência à água; RPE; Fluorescência; Raio-X..
Ano: 2010 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/86
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Mesofauna do solo em ecossistemas naturais e cultivados com culturas perenes, no município de Capitão Poço - Pará. Repositório Alice
TEIXEIRA, L. B.; LEITÃO, P. S..
Tipo: Parte de livro Palavras-chave: Fauna do solo; Capitão Poço; Pará; Brasil; Forest soil; Identification; Animal Invertebrado; Ecossistema; Identificação; Solo Florestal; Amazonia; Ecosystems; Invertebrates; Soil fauna.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/398857
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NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION Gayana Botánica
Boeckx,Pascal; Vervaet,Hilde; Cleemput,Oswald van.
Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral...
Tipo: Journal article Palavras-chave: Emission; Forest soil; Nitrogen; Cycling; Nitric oxide; Nitrous oxide.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003
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ลักษณะดินภายใต้สภาพป่าต่างชนิดบริเวณสถานีวิจัยสิ่งแวดล้อมสะแกราช Thai Agricultural
Woranan Sonkanha; Somchai Anusontpornperm; Suphicha Thanachit; Irb Kheoruenromne; Taksin Artchawakom.
Study on soil characteristics under different types of forest in Sakaerat Environmental Research Station Nakhon Ratchasima province was carried out on eight representative soils including an area of secondary mixed deciduous forest (Skr 1), two sites of dry dipterocarp forest (Skr-2, 3), an ecotone zone (Skr-4), three restoration dry evergreen forest (Skr-5, 6, 7) and an undisturbed dry evergreen forest (Skr-8). All soils located at upper part of middle footslope to upper part of lower footslope which were derived from colluvium over residuum of sandstone. Results revealed that soils under different forest covers are moderately shallow to very deep, which the one under dry dipterocarp forest (Skr-3) is the shallowest. Their texture ranges from sandy loam...
Tipo: Collection Palavras-chave: Forest soil; Physical property; Chemical property; Soil characteristics; ดินป่าไม้; สัณฐานวิทยาของดิน; สมบัติทางฟิสิกส์; สมบัติทางเคมี; Sakaerat Environmental Research Station.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5208
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สมบัติและร้อยละความอิ่มตัวของอะลูมิเนียมในดินที่สูงพื้นที่ขุนวาง และอินทนนท์ จ.เชียงใหม่ Thai Agricultural
Nutthapol Sri-umpai; Somchai Anusontpornperm; Anchalee Suddhiprakarn; Suphicha Thanachit.
Study on Al toxicity level and properties of highland soils in Khun Wang and Inthanon areas wasconducted in 31 pedons, aiming at assessing the relationship between level of Al toxicity and soil properties in order to provide equations suitable for predicting Al saturation of studied soils. Soil pits were used for this research, which included the investigation of general environments of the areas selected. Soil samples were collected with respect to soil genetic horizon and analysed using standard procedures. Soils in both areas were formed from gneiss, granite and diorite and well developed. They had well drained feature. They had low to moderate fertility level, mostly having organic matter accumulation to great depths. The soils under native forest were...
Tipo: Collection Palavras-chave: Highland soil; Soil property; Aluminium saturation; Forest soil; ดินที่สูง; สมบัติดิน; ระดับอะลูมิเนียม; ดินป่าไม้; ปริมาณการอิ่มตัวของอะลูมิเนียม; สมการ; ความเป็นพิษ; พื้นที่อินทนนท์; จ.เชียงใหม่.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5204
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